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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99e0925402e0c0c3d6c4120dc9305659c51bd9f31704b9d29ff20a81f2232fe1' 
  AND token = 'YmCyLK0hcrfU8Qej8QR2skfM0rpR2AsdDHY5R5Ctthg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}